Błędnie: The atmosphere was so to say artful- lots of young talented people, bold revolutionary ideas and a wide range of performances, exhibitions and other events. Poprawnie: The atmosphere was so to say artistic- lots of young talented people, bold revolutionary ideas and a wide range of performances, exhibitions and other events
Przymiotnik "artful" oznacza 'przebiegły, chytry', 'zręczny, pomysłowy'. 'Artystyczny' to "artistic".